From: Jeremy Linton <jeremy.linton@arm.com>
Date: Wed, 19 Aug 2015 21:36:31 +0000 (-0500)
Subject: USB: ehci-platform: Display a DMA configuration error message
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=17f69b5fa6f642898a7dae16dee6997869b1f234;p=linux-beck.git

USB: ehci-platform: Display a DMA configuration error message

If the ehci driver fails to configure the dma settings then display
a dev error instead of simply failing. This is triggered in an
ACPI world if the user fails to set the _CCA on the device.

Tested-by: Huang Shijie <shijie.huang@arm.com>
Reviewed-by: Graeme Gregory <graeme.gregory@linaro.org>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 5c3c08598682..d9144d5ab794 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -162,8 +162,10 @@ static int ehci_platform_probe(struct platform_device *dev)
 
 	err = dma_coerce_mask_and_coherent(&dev->dev,
 		pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
-	if (err)
+	if (err) {
+		dev_err(&dev->dev, "Error: DMA mask configuration failed\n");
 		return err;
+	}
 
 	irq = platform_get_irq(dev, 0);
 	if (irq < 0) {